JPS60208531A - Assembling type box culvert - Google Patents
Assembling type box culvertInfo
- Publication number
- JPS60208531A JPS60208531A JP6561684A JP6561684A JPS60208531A JP S60208531 A JPS60208531 A JP S60208531A JP 6561684 A JP6561684 A JP 6561684A JP 6561684 A JP6561684 A JP 6561684A JP S60208531 A JPS60208531 A JP S60208531A
- Authority
- JP
- Japan
- Prior art keywords
- box culvert
- frame
- point
- hinged
- side frames
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000010008 shearing Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Sewage (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は三点ヒンジの組立式ボックスカルバートに関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-point hinged prefabricated box culvert.
従来の一体型のボックスカルバートは、荷重により全て
の枠に同じような正負の逆転する曲げモーメントが生じ
、従って所定の強度を必要とする正しい配筋が困姓なば
かりでなく、鉄筋量が増大し、全体が大型化する欠点が
あり、加工性、施工性、経済性に問題があった。In conventional one-piece box culverts, the same reverse bending moment of positive and negative occurs in all frames due to load, which not only makes it difficult to arrange the correct reinforcement that requires a certain strength, but also increases the amount of reinforcement. However, it had the disadvantage of increasing the overall size, and there were problems with workability, construction efficiency, and economic efficiency.
そこで本発明は、上梓と左右の側枠とを二点でヒンジ連
結すると共に、底粋の中央をヒンジ連結して、力学的に
最も安定した三点ヒンジの組立式ボックスカルバートを
提供しようとするもので、荷重により上梓には曲げモー
メント及び剪断力が作用するが、側枠及び底粋には曲げ
モーメント及び剪断力の作用が極めて小さく軸力のみが
主として働き、圧縮に強い鉄筋コンクリート構造として
は理想的なものであり、且つ三つの部材から成立つから
、製造時には分割して工場生産ができ、高品質の製品を
製造でき、運搬及び架設が簡単にできるから、工費の節
減、施工期間の短縮ができ、更に、取付護岸水路の形に
合せて側枠を設計することができる等の従来にない画期
的なボックスカルバートを提供しようとするものである
。Therefore, the present invention aims to provide a three-point hinged prefabricated box culvert that is dynamically the most stable by connecting the top and left and right side frames with hinges at two points, and connecting the center of the bottom with a hinge. As a result of loading, bending moment and shearing force act on the top frame, but the bending moment and shearing force act on the side frame and bottom frame very little, and only axial force acts mainly, making it ideal for a reinforced concrete structure that is resistant to compression. Since it is made up of three parts, it can be divided into parts and produced in a factory, making it possible to manufacture high-quality products.It is also easy to transport and erect, reducing construction costs and shortening the construction period. The present invention aims to provide a box culvert that is unprecedented and innovative in that it is possible to design the side frame according to the shape of the seawall waterway to which it is attached.
以下図示する実施例により本発明を詳細に説明すると、
第１図及び第２図において、１は上梓、２．３は左右の
側枠、４，５は左右の底枠を示し、左の側枠２と底枠４
、及び右の側枠３と底枠５とは夫々一体に構成してある
。尚、上枠１の両側部１２．１３もボックスカルバート
全体としての側枠２，３の一部を構成するものであるが
、ここでは上枠１と一体に構成してある。上枠ｌの両側
部１２．１３には、側枠２，３のヒンジ枠部２１，３１
と相対して相互に咬合するヒンジ枠部１１が設けてあり
、これらを貫通するヒンジ軸６，７でヒンジ連結してあ
る。また、左右の底枠４，５は相互に咬合するヒンジ枠
部４１．５１で相対し、ヒンジ軸８でヒンジ連結してあ
る。側枠２，３はこれを施工する取付護岸水路の形状に
合わせて底枠４．５を挟める方向に傾斜して形成してあ
るが、水路の形状によっては従来のボックスカルバート
と同様に垂直であっても良い。また、上記ヒンジ軸６，
７．８は、各粋の厚みの外側に偏位して設けてあり、各
粋に生じる軸圧力を直接に受けないように構成してある
。The present invention will be explained in detail with reference to the examples shown below.
In Figures 1 and 2, 1 indicates the upper frame, 2.3 indicates the left and right side frames, 4 and 5 indicate the left and right bottom frames, and the left side frame 2 and the bottom frame 4.
, and the right side frame 3 and bottom frame 5 are each integrally constructed. Note that the side parts 12 and 13 of the upper frame 1 also constitute part of the side frames 2 and 3 of the box culvert as a whole, but here they are constructed integrally with the upper frame 1. The hinge frame parts 21, 31 of the side frames 2, 3 are attached to both sides 12, 13 of the upper frame l.
A hinge frame part 11 is provided which faces and interlocks with the other parts, and is hingedly connected by hinge shafts 6 and 7 passing through these parts. Further, the left and right bottom frames 4 and 5 face each other at mutually interlocking hinge frame portions 41 and 51, and are hingedly connected at a hinge shaft 8. The side frames 2 and 3 are formed to be inclined in the direction in which the bottom frame 4.5 can be sandwiched in accordance with the shape of the attached revetment waterway in which they will be constructed, but depending on the shape of the waterway, they may be formed vertically like a conventional box culvert. It's okay. In addition, the hinge shaft 6,
7.8 is provided offset to the outside of the thickness of each tip, and is configured so as not to directly receive the axial pressure generated in each tip.
第２図において、右半分の破線９及び、黒点１０は鉄筋
の配筋状態を示してある。In FIG. 2, the broken line 9 and black dots 10 in the right half indicate the reinforcing bar arrangement state.
第３図は上記三点ヒンジの組立式ボックスカルバート構
造のモデルを示し、各粋の厚さｔが０．５ｍ，上枠１の
軸心の巾ａは？．ｍｓ両側部１２．１３の軸心からの高
さｂは１．２５ｍ，側枠２，３の軸心からの高さＣが２
ｍ、底枠４．５の巾ｄが３．５ｍで、６，７．８は三点
のヒンジ連結部を示してある。これに、第４図に示す如
く、上枠１に１．２５ｔ／ＩＩ１の等分布荷重Ｗ及び中
央に集中荷重ｐが加わり、土圧Ｈが両側に底枠２．７１
ｔ／ｍから上枠Ｏｔ／ｍに漸減的に加わると、そのモー
メントＭは第５ａ図の中心線０−０の左半分に図示する
如く、上枠１の両端で１０．４ｔ−ｍ、中央で最大１１
．５ｔ−ｍのモーメントが生じ、ヒンジ連結部６，７か
ら下方の側枠及び底枠のモーメントは最大でも１．４ｔ
−ｍと殆ど無視できる値となる。また剪断力Ｓは第５ａ
図の右半分の剪断力図に示す如く、上枠１の中央から両
側に向って最大８．３ｔ、両側部に最大８．１ｔが生じ
ることとなるが、側枠及び底枠の剪断力Ｓは最大３．２
ｔで極めて小さい値となる。また、軸〜力Ｎは第５ｂ図
の軸方図に示す如く、上枠１の水平部に８．１ｔ、両端
部に８．３ｔの軸力が生じ、側枠２，３には最大９．５
ｔ，底枠には５．２ｔの軸力が生じることとなる。Figure 3 shows a model of the prefabricated box culvert structure with three-point hinges, where the thickness t of each tip is 0.5 m, and the width a of the axis of the upper frame 1? ．． The height b from the axis of the ms side parts 12.13 is 1.25 m, and the height C from the axis of the side frames 2 and 3 is 2.
m, the width d of the bottom frame 4.5 is 3.5 m, and 6 and 7.8 indicate three-point hinge connections. In addition, as shown in Fig. 4, a uniformly distributed load W of 1.25t/II1 is applied to the upper frame 1 and a concentrated load P is applied to the center, and an earth pressure H is applied to the bottom frame 2.71 on both sides.
When applied gradually from t/m to the upper frame Ot/m, the moment M is 10.4 t-m at both ends of the upper frame 1, and 10.4 t-m at the center, as shown in the left half of the center line 0-0 in Fig. 5a. up to 11
．． A moment of 5 t-m is generated, and the moment of the side frame and bottom frame below from the hinge connecting parts 6 and 7 is 1.4 t at the maximum.
−m, which is an almost negligible value. Also, the shearing force S is the fifth a
As shown in the shear force diagram in the right half of the figure, a maximum of 8.3 t is generated from the center of the upper frame 1 to both sides, and a maximum of 8.1 t is generated on both sides, but the shear force S of the side frame and bottom frame is is maximum 3.2
It becomes an extremely small value at t. As for the axial force N, as shown in the axial view of Fig. 5b, an axial force of 8.1 t is generated on the horizontal part of the upper frame 1, an axial force of 8.3 t is generated on both ends, and a maximum of 9 t is generated on the side frames 2 and 3. .5
t, an axial force of 5.2 t will be generated on the bottom frame.
上記の構成からなる本発明のボックスカルバートは、第
２図の如く、護岸Ｇに設置され、水路Ｈを内部に構成し
、上枠１上を橋として架設するものであるが、三点のヒ
ンジ部において、上枠１と左右の側枠及び底粋の三個に
分割し得るから、加工性においては工場生産により高品
質の鉄筋コンクリート製品が得られ、運搬も分割して小
嵩にでき、架設もヒンジ部を咬合してヒンジ軸６，７，
８を挿通して組立てれば良いから、工費の節約、施工期
間の短縮ができる効果があるのみならず、荷重によって
、側枠及び底粋にモーメントも剪断力を加わらず、軸力
のみが主として作用するから、圧縮に強い鉄筋コンクリ
ート構造としては理想的なボックスカルバートを提供す
る効果があり、更に、側枠を屈曲して取付護岸水路の形
状に合せて梯形等の形に予め設計することができるから
、水路に大きな工事や変更を加えることなく設置するこ
とができる等の効果があり、実用に際して益するところ
多大なるものがある。As shown in Fig. 2, the box culvert of the present invention having the above configuration is installed on a seawall G, has a waterway H inside, and is constructed as a bridge on the upper frame 1, but has three hinges. Since it can be divided into three parts: the upper frame 1, left and right side frames, and the bottom frame, high-quality reinforced concrete products can be obtained through factory production in terms of workability, and transportation can be divided into smaller parts, making it easier to construct. also engages the hinge part and the hinge shafts 6, 7,
8 can be inserted and assembled, which not only saves construction costs and shortens the construction period, but also prevents moment shearing force from being applied to the side frame and bottom due to the load, and only the axial force is the main force. Because of this, it has the effect of providing an ideal box culvert as a reinforced concrete structure that is resistant to compression.Furthermore, the side frame can be bent and designed in advance into a trapezoidal shape or other shape to match the shape of the installed revetment waterway. Therefore, it has the effect of being able to be installed without major construction or changes to the waterway, and has many practical benefits.
第１図は本発明に係る組立式ボックスカルバートの一実
施例を示す斜視図、第２図はその右半分で配筋を示す正
面図、第３図はその一実施例の構造モデルを示す説明図
、第４図は前記構造モデルの一使用態様における荷重状
態を示す説明図、第５ａ図及び第５ｂ図はその荷重を受
けたときのモーメント図、剪断力図、及び軸方図を示す
説明図である。
１：上枠２，３：側枠
４，５：底枠６．１．８：ヒンジ軸
１１，２１．３１．４１．５１：ヒンジ枠部７ψ′
−ｉｓ２一Fig. 1 is a perspective view showing an embodiment of the prefabricated box culvert according to the present invention, Fig. 2 is a front view showing the reinforcement arrangement in the right half of the culvert, and Fig. 3 is an explanation showing a structural model of the embodiment. Fig. 4 is an explanatory diagram showing the load state in one usage mode of the structural model, and Figs. 5a and 5b are explanatory diagrams showing the moment diagram, shear force diagram, and axial diagram when receiving the load. It is a diagram. 1: Top frame 2, 3: Side frame 4, 5: Bottom frame 6.1.8: Hinge shaft 11, 21. 31. 41.51: Hinge frame 7ψ' -is2-
Claims (1)
に、底枠の中央の一点をヒンジ連結してなる三点ヒンジ
の組立式ボックスカルバート（２）特許請求の範囲（１
１において、三点ヒンジ連結軸を、枠体の軸力が作用す
る軸線に対して偏位した位置に設定してなる組立式ボッ
クスカルバート（３）上梓と側枠とを左右の二点でヒン
ジ連結すると共に、底粋の中央の一点をヒンジ連結して
なる三点ヒンジの組立式ボックスカルバートにおいて、
前記左右の二点ヒンジ連結部の下方の側枠を底枠を挟め
る方向に屈曲して設け、全体として梯形をなすように構
成してなる三点ヒンジの組立式ボソクス力ノレバート （４）特許請求の範囲（３）において、三点ヒンジ連結
軸を、枠体の軸力が作用する軸線に対して偏位した位置
に設定してなる組立式ボソクスカルバート[Claims] (11) Patent claim for a three-point hinged box culvert (2) in which the top frame and side frames are hinged at two points on the left and right, and the bottom frame is hinged at one point in the center. range (1
In 1, the prefabricated box culvert is formed by setting the three-point hinge connection axis at a position offset from the axis on which the axial force of the frame body acts. (3) The upper and side frames are hinged at two points on the left and right In the prefabricated box culvert with three-point hinge, which is connected at the same time as hinged at one point in the center of the base,
The lower side frames of the left and right two-point hinge connection portions are bent in the direction to sandwich the bottom frame, and the three-point hinge is configured to form a trapezoidal shape as a whole. (4) Patent Claim In range (3), a prefabricated box culvert in which the three-point hinge connection shaft is set at a position offset from the axis on which the axial force of the frame body acts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6561684A JPS60208531A (en) | 1984-04-02 | 1984-04-02 | Assembling type box culvert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6561684A JPS60208531A (en) | 1984-04-02 | 1984-04-02 | Assembling type box culvert |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60208531A true JPS60208531A (en) | 1985-10-21 |
| JPS6327493B2 JPS6327493B2 (en) | 1988-06-03 |
Family
ID=13292128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6561684A Granted JPS60208531A (en) | 1984-04-02 | 1984-04-02 | Assembling type box culvert |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60208531A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0370285U (en) * | 1989-11-11 | 1991-07-15 |
-
1984
- 1984-04-02 JP JP6561684A patent/JPS60208531A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6327493B2 (en) | 1988-06-03 |
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